Step - Create the Top-Level Model
When we think about our final draft, we realise that all the Entities are Hierarchies.
For example, the Services are grouped on Categories, Staff are in Organisation Hierarchies
(where people usually report one-level up), and so on.
We show this in our Model as self-referencing Relationships for each Entity, which we call
Recursive or Reflexive Relationships, or 'Rabbits-Ears'.
In this Model, the Life Cycle of an Asset is shown as Services that cover the
typical Phases of :-
Finally the Disposal of an Asset.
We have also created separate Subject Area Models :-
Parties, Roles and Customers